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support large info-sections in torrent_info

This commit is contained in:
arvidn 2015-10-31 10:53:39 -04:00
parent 3462c061a7
commit f5da27ba9e
2 changed files with 23 additions and 19 deletions
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8
include/libtorrent/torrent_info.hpp
View File

@ -608,12 +608,12 @@ namespace libtorrent
// the hash that identifies this torrent
sha1_hash m_info_hash;
// the number of bytes in m_info_section
boost::uint32_t m_info_section_size;
// the index to the first leaf. This is where the hash for the
// first piece is stored
boost::uint32_t m_merkle_first_leaf;
// the number of bytes in m_info_section
boost::uint32_t m_info_section_size:24;
boost::uint32_t m_merkle_first_leaf:24;
// this is used when creating a torrent. If there's
// only one file there are cases where it's impossible

34
src/torrent_info.cpp
View File

@ -623,8 +623,8 @@ namespace libtorrent
, m_created_by(t.m_created_by)
, m_creation_date(t.m_creation_date)
, m_info_hash(t.m_info_hash)
, m_merkle_first_leaf(t.m_merkle_first_leaf)
, m_info_section_size(t.m_info_section_size)
, m_merkle_first_leaf(t.m_merkle_first_leaf)
, m_multifile(t.m_multifile)
, m_private(t.m_private)
, m_i2p(t.m_i2p)
@ -769,8 +769,8 @@ namespace libtorrent
, int flags)
: m_piece_hashes(0)
, m_creation_date(0)
, m_merkle_first_leaf(0)
, m_info_section_size(0)
, m_merkle_first_leaf(0)
, m_multifile(false)
, m_private(false)
, m_i2p(false)
@ -786,8 +786,8 @@ namespace libtorrent
torrent_info::torrent_info(lazy_entry const& torrent_file, int flags)
: m_piece_hashes(0)
, m_creation_date(0)
, m_merkle_first_leaf(0)
, m_info_section_size(0)
, m_merkle_first_leaf(0)
, m_multifile(false)
, m_private(false)
, m_i2p(false)
@ -816,8 +816,8 @@ namespace libtorrent
torrent_info::torrent_info(entry const& torrent_file)
: m_piece_hashes(0)
, m_creation_date(0)
, m_merkle_first_leaf(0)
, m_info_section_size(0)
, m_merkle_first_leaf(0)
, m_multifile(false)
, m_private(false)
, m_i2p(false)
@ -850,8 +850,8 @@ namespace libtorrent
torrent_info::torrent_info(bdecode_node const& torrent_file, int flags)
: m_piece_hashes(0)
, m_creation_date(0)
, m_merkle_first_leaf(0)
, m_info_section_size(0)
, m_merkle_first_leaf(0)
, m_multifile(false)
, m_private(false)
, m_i2p(false)
@ -866,8 +866,8 @@ namespace libtorrent
torrent_info::torrent_info(char const* buffer, int size, int flags)
: m_piece_hashes(0)
, m_creation_date(0)
, m_merkle_first_leaf(0)
, m_info_section_size(0)
, m_merkle_first_leaf(0)
, m_multifile(false)
, m_private(false)
, m_i2p(false)
@ -886,8 +886,8 @@ namespace libtorrent
torrent_info::torrent_info(std::string const& filename, int flags)
: m_piece_hashes(0)
, m_creation_date(0)
, m_merkle_first_leaf(0)
, m_info_section_size(0)
, m_merkle_first_leaf(0)
, m_multifile(false)
, m_private(false)
, m_i2p(false)
@ -912,8 +912,8 @@ namespace libtorrent
torrent_info::torrent_info(std::wstring const& filename, int flags)
: m_piece_hashes(0)
, m_creation_date(0)
, m_merkle_first_leaf(0)
, m_info_section_size(0)
, m_merkle_first_leaf(0)
, m_multifile(false)
, m_private(false)
, m_i2p(false)
@ -949,8 +949,8 @@ namespace libtorrent
, int flags)
: m_piece_hashes(0)
, m_creation_date(0)
, m_merkle_first_leaf(0)
, m_info_section_size(0)
, m_merkle_first_leaf(0)
, m_multifile(false)
, m_private(false)
, m_i2p(false)
@ -963,8 +963,8 @@ namespace libtorrent
torrent_info::torrent_info(char const* buffer, int size, error_code& ec, int flags)
: m_piece_hashes(0)
, m_creation_date(0)
, m_merkle_first_leaf(0)
, m_info_section_size(0)
, m_merkle_first_leaf(0)
, m_multifile(false)
, m_private(false)
, m_i2p(false)
@ -980,8 +980,8 @@ namespace libtorrent
torrent_info::torrent_info(std::string const& filename, error_code& ec, int flags)
: m_piece_hashes(0)
, m_creation_date(0)
, m_merkle_first_leaf(0)
, m_info_section_size(0)
, m_merkle_first_leaf(0)
, m_multifile(false)
, m_private(false)
, m_i2p(false)
@ -1004,8 +1004,8 @@ namespace libtorrent
, int flags)
: m_piece_hashes(0)
, m_creation_date(0)
, m_merkle_first_leaf(0)
, m_info_section_size(0)
, m_merkle_first_leaf(0)
, m_multifile(false)
, m_private(false)
, m_i2p(false)
@ -1034,8 +1034,8 @@ namespace libtorrent
: m_piece_hashes(0)
, m_creation_date(time(0))
, m_info_hash(info_hash)
, m_merkle_first_leaf(0)
, m_info_section_size(0)
, m_merkle_first_leaf(0)
, m_multifile(false)
, m_private(false)
, m_i2p(false)
@ -1152,8 +1152,7 @@ namespace libtorrent
h.update(section.first, section.second);
m_info_hash = h.final();
// the internal metadata size is only 24 bits
if (section.second >= (2<<24))
if (section.second >= UINT32_MAX)
{
ec = errors::metadata_too_large;
return false;
@ -1251,6 +1250,11 @@ namespace libtorrent
}
int num_leafs = merkle_num_leafs(files.num_pieces());
int num_nodes = merkle_num_nodes(num_leafs);
if (num_nodes - num_leafs >= (2<<24))
{
ec = errors::too_many_pieces_in_torrent;
return false;
}
m_merkle_first_leaf = num_nodes - num_leafs;
m_merkle_tree.resize(num_nodes);
std::memset(&m_merkle_tree[0], 0, num_nodes * 20);